package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    SetmealMapper setmealMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;
    @Autowired
    CategoryMapper categoryMapper;
    @Autowired
    DishMapper dishMapper;

    /**
     * 分页查询套餐
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        long total = page.getTotal();
        List<SetmealVO> result = page.getResult();
        for (SetmealVO setmealVO : result) {
            setmealVO.setCategoryName(categoryMapper.getNamebyId(setmealVO.getCategoryId()));
        }
        return new PageResult(total,result);
    }

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        for (SetmealDish setmealDish : setmealDishes) {
            //查询是否包含停售菜品
            Long dishId = setmealDish.getDishId();
            Integer status = dishMapper.getById(dishId).getStatus();
            if(status.equals(StatusConstant.DISABLE)){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
            }
        }
        setmealMapper.insert(setmeal);
        Long setmealId = setmeal.getId();
        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(setmealId);
        }
        setmealDishMapper.saveBatch(setmealDishes);
    }

    /**
     * 批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //查询套餐状态
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus().equals(StatusConstant.ENABLE)){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //删除套餐
        setmealMapper.deleteBatch(ids);
        //删除相关套餐菜品数据
        setmealDishMapper.deleteBatch(ids);
    }

    /**
     * 停售起售套餐
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        if (status ==1) {
            List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
            for (SetmealDish setmealDish : setmealDishes) {
                Long dishId = setmealDish.getDishId();
                Dish dish = dishMapper.getById(dishId);
                if(dish.getStatus() == 0){
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            }
        }
        Setmeal setmeal = new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);
        setmealMapper.update(setmeal);
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐数据
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealMapper.update(setmeal);
        List<Long> ids = new ArrayList<>();
        ids.add(setmeal.getId());
        setmealDishMapper.deleteBatch(ids);
        Long setmealId = setmeal.getId();
        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(setmealId);
        }
        setmealDishMapper.saveBatch(setmealDishes);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
